Blocked (7)
'blocked' is the definition.
(clogging is a kind of blocking)
This is the entire clue.
(Other definitions for clogged that I've seen before include "Congested, choked" , "Blocked" , "Some morris dancers are" .)
'blocked' is the definition.
(similar in meaning)
This is the entire clue.
(Another definition for obstructed that I've seen is " Stopped".)